Sleeping only 1-3 hours at a time, i don't have trouble falling asleep, but can't seem to stay asleep thru the night. tried melatonin 1.5 didn't work.

Time for sleep doc: Please see a sleep specialist. Your insomnia is significant and with over 80 sleep disorders it will take a considerable history and some testing to sort it out. Sleep is extremely important and the lack of it can be both psychologically and physically damaging. Good luck to you!

Sleep: Best to see a sleep specialist. A sleep study may be needed to figure out what's happening, eg, sleep apnea, plms, parasomnias, etc. Proper sleep habits/hygiene are essential.